How To Fix MM057 - The required default unit of measure has not yet been maintained

SAP Error Message - Details

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 057

• Message text: The required default unit of measure has not yet been maintained

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MM057 - The required default unit of measure has not yet been maintained ?

  The SAP error message MM057, which states "The required default unit of measure has not yet been maintained," typically occurs in the Materials Management (MM) module when a material master record is missing a default unit of measure. This can happen during various transactions, such as creating or changing a material, or when trying to perform a goods movement.
  Cause:
  The error is caused by the absence of a default unit of measure in the material master data for the specific material you are trying to work with. The default unit of measure is essential for SAP to understand how to handle quantities for that material.
  Solution:
  To resolve this error, you need to maintain the default unit of measure in the material master record. Here are the steps to do this:
  
  
  Access Material Master:
  
  Go to the transaction code MM02 (Change Material) or MM01 (Create Material) in SAP.
  
  
  
  Enter Material Number:
  
  Input the material number that is causing the error.
  
  
  
  Select Views:
  
  Choose the appropriate views that you need to maintain. Typically, you will need to select the "Basic Data" view and possibly the "Purchasing" or "Sales" views, depending on your requirements.
  
  
  
  Maintain Units of Measure:
  
  In the Basic Data view, look for the "Units of Measure" section.
  Enter the default unit of measure (e.g., EA for each, KG for kilograms, etc.) in the appropriate field.
  Ensure that the unit of measure is defined in the system and is valid for the material.
  
  
  
  Save Changes:
  
  After entering the required information, save the changes to the material master record.
  
  
  
  Re-attempt the Transaction:
  
  Go back to the transaction that triggered the error and try again.
  
  
  
  Related Information:
  
  
  Unit of Measure Configuration: Ensure that the unit of measure you are trying to use is defined in the system. You can check this in the configuration settings under SPRO -> Logistics - General -> Material Master -> Basic Settings -> Units of Measure.
  
  
  Material Types: Different material types may have different requirements for units of measure. Make sure you are following the correct procedures for the specific material type you are working with.
  
  
  User Authorizations: Ensure that you have the necessary authorizations to change material master data.
  
  
  Documentation: Refer to SAP Help documentation for more detailed information on material master data and units of measure.
  
  
  By following these steps, you should be able to resolve the MM057 error and maintain the necessary default unit of measure for your materials in SAP.